Relationships

Guys, Iam in relationship with a guy his ex girlfriend cheated on him and left him last year now after 3months he started missing her what to do?

I love my boyfriend from past 7yrs he was with some else so i never bothered him in his relationship after his breakup i confessed my love for him but at first he rejected and after one year he proposed me himself saying that he starts liking me and wants to be with me forever but stated that too he is still not properly over his ex but dont want her in his life anymore after being with me he saw his ex in a wedding of their cousin but my boyfriend felt nothing for her he was only being attracted towards me i was really happy to see this that may be he has moved on from her. Recently his ex girlfriend texted him to ask something he replied him rudely and showed me their conversation but after that everything is changed he is not feeling anything for me but still says he will only marry me he is Missing his ex from last 4 days and is in depression he is not even taking to me he is suffering from bipolar disorder too and is on medication since past 8 years. Today at 6am morning i was sleeping he called me and waked me up and told me that he had masturbated several times in these 3 to 4 days while imagining his ex girlfriend and by seeing their videos and pics i was shocked we are in a long distance relationship so he told me all this over a text i feel soo heart broken i feel cheated i trusted him a lot but i can't live without him what should i do iam really confused please someone give me some good advices iam really very depressed
Guys, Iam in relationship with a guy his ex girlfriend cheated on him and left him last year now after 3months he started missing her what to do?
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